Diffusion Tubes

Diffusion Tube Data Centre

Choose a Local Authority:

This website is used voluntarily by local authorities and in some cases only historical data is available. The website is newly available having been offline since 2010. Local authorities may hold other Nitrogen Dioxide Diffusion Tube data, which will be available in individual LAQM reports which can be obtained directly from each local authority.

Only local authorities who have registered to use the system are listed. If the local authority you are looking for is not listed, this does not mean they do not carry not diffusion tube monitoring.

When searching for results by date, only the dates for which data has been entered by local authorities are shown.

Information on the Diffusion Tube Data Centre

User Guide

Data Type

All results provided are raw data and have not been corrected for bias. Please see the bias adjustment pages for more information.

Data Availability

This website is used voluntarily by local authorities and in some cases only historical data is available. The website is newly available having been offline since 2010. Local authorities may hold other Nitrogen Dioxide Diffusion Tube data, which will be available in individual LAQM reports which can be obtained directly from each local authority.

Only local authorities who have registered to use the system are listed. If the local authority you are looking for is not listed, this does not mean they do not carry not diffusion tube monitoring.

When searching for results by date, only the dates for which data has been entered by local authorities are shown.

Information for Authorities formed in 2009

In 2009, nine new Unitary Authorities were created by combining several smaller local authorities. Therefore, the local authority name under which monitoring was carried out will have changed at this time.

These new authorities are:

Bedford (formed from Bedford District Council)

Central Bedfordshire (formed from Mid Bedfordshire and South Bedfordshire)

Cheshire East (formed from Congleton, Crewe & Nantwich and Macclesfield District Councils)